Asexual Reproduction UPCO Chapter 19 Asexual Reproduction Results

Asexual Reproduction UPCO: Chapter 19

Asexual Reproduction • Results from mitotic cell division • One cell (the parent cell) divides into 2 identical daughter cells. • The new offspring are IDENTICAL to the parent in every way • More common in invertebrate animals • Types of asexual reproduction are: • • • Binary fission Sporulation Budding Regeneration Cloning Vegetative propagation

Do Now… Answer questions # 1 -3 on page 329.

Binary Fission • Simplest type of asexual reproduction • One cell divides to form 2 daughter cells • 2 daughter cells are exactly like parent cell • Nucleus and cytoplasm divide equally • Amoebas, paramecium, bacteria reproduce this way

Do Now… Answer questions #1 -2 on pages 329, 330.

Budding • A new organism develops as an outgrowth of the parent • the new organism is called the bud • It is a tiny duplicate of the parent • The cytoplasm does not divide equally, but the nucleus does • The bud usually separates from the parent and forms its own colony • This occurs in hydras and yeasts

Do Now… Answer questions # 1 -3 on page 330.

Sporulation • Spores contain a small amount of cytoplasm and a nucleus • They are surrounded by a tough protective covering • They are able to survive in unfavorable conditions • When conditions become favorable they develop into a new organism • Mosses, molds, mushrooms, and ferns go through sporulation

Do Now… Answer questions # 1, 2 on page 330.

Regeneration • Development of a new organism from part of the parent • Replacement of lost body parts • Occurs mostly in invertebrates • Occurs in planaria, starfish

Do Now… Answer questions # 1, 2 on page 331.

Vegetative Propagation • Part of a plant (root, stem, leaf) grows into a new plant • New plant is exactly like the parent plant • Seedless fruits and vegetables are reproduced this way • It is fast, easy, and usually very successful • Can occur artificially or naturally • Naturally- runners, tubers, rhizomes, bulbs • Artificially- cuttings, grafting

Types of Vegetative Propagation

Do Now… Answer questions # 1, 2 on page 332.

Do Now… • Complete the chart on page 336. • Answer all questions on pages 337338. • There will be an Exam on Friday. • STUDY, STUDY!!!